At least in the mac beta, Scrivener 3 is Pandoc aware, if you have it installed it will provide some custom compile presets, and it makes some minor changes when converting to markdown (the syntax is almost, but not quite, identical to MMD). For more flexibility, with post-processing you can run pandoc template systems like pandocomatic, which mean you can have a lot of control over the pandoc settings.

We don’t ship Pandoc with Scrivener like we do MMD, because the latter compressed down to 413kb and Pandoc compresses down to half of the size of Scrivener itself. So you’ll need to download and install it yourself, but once you do you’ll get appropriate options in the Compile for setting at the top.

Pandoc is huge, and we only provided a small selection of some useful formats that filled a few gaps people have asked for over the years. A better Word route, DocBook and a solid Markdown-based eBook publishing route. But, the door is wide open to whatever you need given that aforementioned Processing pane.

.:.Ioa Petra'ka“Whole sight, or all the rest is desolation.” —John Fowles